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LOINC Code 91671-8: Transferrin.carbohydrate deficient.disialo/Total transferrin standardized per IFCC-RMP for CDT [Mass fraction]

91671-8 is a LOINC code used to identify Transferrin.carbohydrate deficient.disialo/Total transferrin standardized per IFCC-RMP for CDT [Mass fraction] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Transferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDT. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Transferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDT. It is commonly used with the system or sample type Ser/Plas.

When is it used?

  • Used in lab systems, EHRs, and clinical data exchange.
  • May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
  • Status: ACTIVE
  • Order vs observation: Both

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

Transferrin.carbohydrate deficient.disialo/Transferrin.total standardized per IFCC-RMP for CDT in Serum or Plasma
Transferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDT
The percent fraction of disialotransferrin to total transferrin standardized per the International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) HPLC reference measurement procedure (RMP) for carbohydrate-deficient transferrin (CDT) in serum specimens. The upper reference limit for the IFCC-RMP for CDT is 1.7% and <2.0% cut-off value is proposed for forensic use.[PMID28025028]
CDT; CDT Disialo; Chemistry; Di-oligo; Glycosylated transferrin; Mass fraction; Percent; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; Siderophilin; SR; Tf; Tot; Totl; Trf; TRFRN

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Transferrin.carbohydrate deficient.disialo/Total transferrin standardized per IFCC-RMP for CDT [Mass fraction]Transferrin.carbohydrate deficient.disialo/Transferrin.total standardized per IFCC-RMP for CDT in Serum or PlasmaCDT Disialo/Tf per IFCC-RMP CDT MFr S/PTransferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDTCHEMTransferrin.carbohydrate deficient.disialo/Transferrin.total Standardized per IFCC-RMP for CDT, BloodMFr

Frequently asked questions

Code details

Code91671-8
SystemLOINC
Display nameTransferrin.carbohydrate deficient.disialo/Total transferrin standardized per IFCC-RMP for CDT [Mass fraction]
DescriptionTransferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDT
Short nameCDT Disialo/Tf per IFCC-RMP CDT MFr S/P
ComponentTransferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDT
PropertyMFr
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.66
Last changed2.66

Consumer names

Transferrin.carbohydrate deficient.disialo/Transferrin.total Standardized per IFCC-RMP for CDT, Blood

Part names

Transferrin.carbohydrate deficient.disialo/Transferrin.total^^standardized per IFCC-RMP for CDTMFrPtSer/PlasQnMass fractionPoint in time (spot)Serum or Plasma

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.